<template>
  <view>
    <view class="goods-item">
        <!-- 左侧的盒子 -->
        <view class="goods-item-left">
          <radio :checked="goods.goods_state" color="#C00000" v-if="showRadio" @click="radioClickHandler"></radio>
          <image :src="goods.goods_small_logo || defaultPic" class="goods-pic"></image>
        </view>
        <!-- 右侧的盒子 -->
        <view class="goods-item-right">
          <!-- 商品的名字 -->
          <view class="goods-name">{{goods.goods_name}}</view>
          <view class="goods-info-box">
            <!-- 商品的价格 -->
            <view class="goods-price">￥{{goods.goods_price | tofixed}}</view>
            <!-- 商品的数量 -->
            <uni-number-box :min="1" :value="goods.goods_count" v-if="showNum" @change="numChangeHandler"></uni-number-box>
          </view>
        </view>
      </view>
  </view>
</template>

<script>
  export default {
    name:"my-goods",
    props: {
      // 组件的属性
      goods: {
        type: Object,
        default: {}
      },
      showRadio: {
        type: Boolean,
        // 默认情况下不展示 radio 组件
        default: false
      },
      showNum: {
        type: Boolean,
        default: false 
      }
    },
    data() {
      return {
        // 默认的图片
        defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
      };
    },
    filters: {
      tofixed(num) {
        return Number(num).toFixed(2)
      }
    },
    methods: {
      // radio 组件的点击事件处理函数
      radioClickHandler() {
        // 通过 this.$emit() 触发外界通过 @ 绑定的 radio-change 事件，
        // 同时把商品的 Id 和 勾选状态 作为参数传递给 radio-change 事件处理函数
        this.$emit('radio-change', {
          // 商品的 Id
          goods_id: this.goods.goods_id,
          // 商品最新的勾选状态
          goods_state: !this.goods.goods_state
        })
      },
      // 监听到了 NumberBox 组件数量变化的事件
      numChangeHandler(val) {
        // console.log(val)
        // 通过 this.$emit() 触发外界通过 @ 绑定的 num-change 事件，并向外界传参
        this.$emit('num-change', {
          goods_id: this.goods.goods_id,
          goods_count: +val
        })
      }
    }
  }
</script>

<style lang="scss">
.goods-item {
  display: flex;
  padding: 10px 5px;
  border-bottom: 1px solid #f0f0f0;
  width: 750rpx;
  box-sizing: border-box;
  .goods-item-left {
    margin-right: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    .goods-pic {
      width: 100px;
      height: 100px;
      // block 是所有元素都占一行，flex 是包裹在一起的元素占一行
      display: block;
    }
  }
  .goods-item-right {
    display: flex;
    flex: 1; // 
    flex-direction: column;
    justify-content: space-between;
    .goods-name {
      font-size: 13px;
    }
    .goods-info-box {
      display: flex;
      justify-content: space-between;
      align-items: center;
      .goods-price {
        color: #C00000;
        font-size: 16px;
      }
    }
  }
}
</style>